I agree, I instantly thought of three people I wanted to share a song with. Also, I know I would want to customize my experience, because I don't like all electronic music.
I love the concept! When I first got to the site, I figured everything out easily, except I found myself wanting an explanation of what it was. For example: "Listen to music from up and coming EDM artists." or "All the top EDM hits in one playlist." Something to give me a definitive idea of what it is I'm using, and maybe explain where the music comes from.
Do you have a website? that can help.
Also try posting ads on craigslist and perhaps networking with small businesses in your area.
My dad is a small business owner and I was able to start building my portfolio working for him, and then moving on to other small business owners he knows.
Odds are you have connections you haven't thought about, but they can really help you get off the ground.